I ended up with post-surgical ileus after my 2nd abdominal surgery within 13 months of the 1st one. I had no problems after my 1st surgery, though. My symptoms were like what you describe, but I did also have intermittent vomiting. I never, ever, ever in my 50+ years had experienced the feeling of not being able to eat. I was also starved, even though I could not eat hardly anything.
I ended up back in the hospital [not that you will] and they explained that with an abdominal surgery of this type that sometimes the small intestine goes to sleep and has trouble waking up. I think they said pain meds [mine was oxycodone] can contribute to ileus and I did take more pain meds after my 2nd surgery and was not as active as I was after my 1st surgery.
I will add that I experienced a little of these symptoms prior to surgery and chocked it up to Crohn's symptoms. I was also very, very weak, anemic, etc with my 2nd surgery, so that very well could have contributed to my issues, as well.
If you are not vomiting and are having output, can manage to keep some liquids going and walk as much as you can, hopefully it will work it's way out. I would still mention it to your surgeon when you talk to them.
My surgical nurse told me that she experienced the not being able to eat after her abdominal surgery and it worked it's way out. I think she said she did lots of broth and craved McDonald's milkshakes.
58 year old Grandma in the Buckeye State.
UC DX 2006 in 2007 DX was changed to Crohn's Colitis.
June 2010 had 10 inches of my colon removed due to a stricture.
Refused Remicade and Humira and opted for what I was certain would be my end result.
July 2011 had a proctocolectomy with permanent end ileostomy.
Got my life back with no regrets. Life is GOOD !!!